Similar to Set class, Map class allows you to associate one value (the key) with another value. Both the key and value can be any valid X++ type, including objects. The types of the key and the value are specified in the declaration of the map. The way in which maps are implemented means that access to the values is very fast.
Below is a sample code that sets and retrieves values from a map.
static void checkItemNameAliasDuplicate(Args _args)
{
inventTable inventTable;
Map map;
MapEnumerator mapEnumerator;
NameAlias nameAlias;
int counter = 0;
;
map = new Map(Types::String, Types::Integer);
//If the second type is an object the "Types" value is Types::record
//map = new Map(Types::String, Types::record);
//store into map
while select inventTable
{
nameAlias = inventTable.NameAlias;
if (!map.exists(nameAlias))
{
map.insert(nameAlias, 1);
}
else
{
map.insert(nameAlias, map.lookup(nameAlias) + 1);
}
}
//retrieve from map
mapEnumerator = map.getEnumerator();
while (mapEnumerator.moveNext())
{
nameAlias = mapEnumerator.currentKey();
info(strfmt("%1,%2",mapEnumerator.currentKey(),mapEnumerator.currentValue()));
}
}
AX / Dynamics 365 For Finance and Operations blog 